A relatively thin metallic item, having a concave or cupped contour, designed to effect its own seal by compression against the circumference of a hole. It is used as a blowout plug in boilers, engines, and the like to relieve the pressure created by the expansion of fluids caused by heat or freezing.
Classification: Parts for steam or other vapor generating boilers and super-heated water boilers, except heat exchangers
NSN 6150-01-158-5653
NSN 5996-01-467-9391
NSN 6220-00-353-5730
NSN 6685-01-147-5617
NSN 6130-00-180-2175
NSN 6610-01-462-3508
NSN 5925-00-227-0396
NSN 5998-01-187-1879
NSN 6105-01-278-9220
NSN 6105-01-205-7190
NSN 5950-01-139-6830
NSN 6135-01-467-5100